Gdańsk-Kraków-Łódź-Warszawa Seminar in Singularity Theory
dr hab. Ch. Eyral, prof. dr hab. T. Krasiński, dr A. Nowel, dr hab. A. Valette
Monthly online seminar organized via the Zoom platform. To receive the announcements and Zoom details to connect to the meetings, please contact the organizers at cheyral(at)impan(dot)pl
Academic year 2022 / 2023
21 April 2023
- 14:30 - 15:30 : Maria Michalska (Universidade Federal do Ceara, Fortaleza)
- 15:45 - 16:45 : Aftab Patel (University of Western Ontario)
24 March 2023
- 10:00 - 11:00 : Enrique Artal Bartolo (Universidad de Zaragoza)
Topology of surface singularities: superisolated, Lê-Yomdin and weighted Lê-Yomdin
- 11:15 - 12:15 : Aleksandra Zakrzewska (Uniwersytet Łódzki)
Extension of the Gusein-Zade theorem on the jumps equal to 1 of the Milnor number in deformations of plane curve singularities
24 February 2023 - special session with Brazil
- 14:00 - 14:45 : Hellen Monção de Carvalho Santana (University of São Paulo)
A study on the local topology of a deformation of a function-germ with a one-dimensional critical set
- 15:00 - 15:45 : Taciana Oliveira Souza (Federal University of Uberlândia)
On the topology of the Milnor fibration
- 16:00 - 16:45 : Eder Leandro Sanchez Quiceno (University of São Paulo)
Links of mixed polynomials with a nice Newton inner non-degenerate boundary
20 January 2023
- 10:00 - 11:00 : Armin Rainer (Universität Wien)
Tame properties of differentiable functions
- 16:00 - 17:00 : Jawad Snoussi (Universidad Nacional Autónoma de México, Cuernavaca)
On tangency in equisingular families of curves and surfaces
12-16 December 2022 (hybrid, online & IMPAN)
Gdańsk-Kraków-Łódź-Warszawa workshop in Singularity Theory - a special session dedicated to the memory of S. Łojasiewicz
18 November 2022
- 8:00 - 8:45 : Dmitry Kerner (Ben Gurion University of the Negev, Be’er Sheva)
Generalizations of Newton non-degeneracy for hypersurface singularities
- 9:00 - 9:45 : Christophe Eyral (IMPAN)
Zeta-function and µ*-Zariski pairs of surfaces
- 10:00 - 10:45 : Goulwen Fichou (Université de Rennes)
Saturation, seminormalization and homeomorphisms of algebraic varieties
Academic year 2021 / 2022
27 May 2022
- 09:00 - 10:00 : Dmitry Kerner (Ben Gurion University of the Negev, Be’er Sheva)
Germs of maps, group actions and large modules inside group orbits
- 10:15 - 11:15 : Helmut Hamm (Universität Münster)
An approach to Zariski-van Kampen theorems
29 April 2022 - special session with Vietnam
- 09:00 - 09:45 : Nguyen Tat Thang (Vietnam Academy of Science and Technology, Hanoi)
Bifurcation set of non-degenerate rational functions
- 10:00 - 10:45 : Nguyen Xuan Viet Nhan (Vietnam Institute for Advanced Study in Mathematics, Hanoi)
Nice cell decomposition and its application to calculating moderately discontinuous homology
- 11:00 - 11:45 : Pho Duc Tai (Hanoi University of Science, Vietnam National University, Hanoi)
Elliptic curves with singularities, from geometry, number theory to post-quantum cryptography
25 March 2022
- 10:00 - 11:00 : Lev Birbrair (Federal University of Ceará, Fortaleza)
Lipschitz geometry of surface germs in R^4: metric knots
- 11:15 - 12:15 : Adam Różycki (Uniwersytet Łódzki)
Effective Bertini theorem and formulas for multiplicity and the local Łojasiewicz exponent
25 Feb. 2022
- 10:00 - 11:00 : Patricio Almirón (Universidad Complutense de Madrid)
The minimal Tjurina number and the 4/3 problem for plane curve singularities
- 11:15 - 12:15 : Maciej Denkowski (Uniwersytet Jagielloński)
Testing Lipschitz non-normally embedded complex spaces
21 Jan. 2022
10:00 - 11:00 : Juan José Nuño-Ballesteros (Univ. València, Spain)
The cone structure theorem
17 Dec. 2021 - special session with Brazil
- 14:15 - 15:00 : Thaís Maria Dalbelo (Univ. Federal de Sao Carlos)
Newton Polyhedra and Whitney Equisingularity for Determinantal Singularities
- 15:15 - 16:00 : José Edson Sampaio (Univ. Federal do Ceara, Fortaleza)
Differential invariance of the multiplicity of real and complex analytic sets
- 16:15 - 17:00 : Otoniel Nogueira da Silva (Univ. Federal de Sao Carlos)
Equisingularity in families of curves and surfaces
26 Nov. 2021
- 10:00 - 11:00 : Jean-Paul Brasselet (I2M CNRS and Aix-Marseille Univ.)
Generic sections of essentially isolated determinantal singularities
- 11:15 - 12:15 : Meral Tosun (Galatasaray Univ., Istanbul)
Lojasiewicz exponent of rational singularities and ideals in their local ring
29 Oct. 2021
- 10:00 - 11:00 : Mark Spivakovsky (CNRS, Univ. Toulouse)
μ-constant families of Newton non-degenerate singularities admit simultaneous embedded desingularization
- 11:15 - 12:15 : Zbigniew Jelonek (IMPAN, Warsaw)
On the Fukui-Kurdyka-Paunescu Conjecture
Academic year 2020 / 2021
28 May 2021 - special session with Japan
- 09:00 - 10:00 : Mutsuo Oka (Tokyo University of Science)
Almost non-degenerate functions and a Zariski pair of links
- 10:15 - 11:15 : Toshizumi Fukui (Saitama University)
Properness of polynomial maps with Newton polyhedrons
30 Apr. 2021
- 10:00 - 11:00 : Wojciech Kucharz (Uniwersytet Jagielloński, Kraków)
Rational approximation of holomorphic maps
- 11:15 - 12:15 : Marcin Bilski (Uniwersytet Jagielloński, Kraków)
Effective approximation of the solutions of algebraic equations
26 Mar. 2021
- 10:00 - 11:00 : Meral Tosun (Galatasaray Üniversitesi, Istanbul)
Simple elliptic singularities and Generalized Slodowy Slices
- 11:15 - 12:15 : Tadeusz Krasiński (Uniwersytet Łódzki)
The Łojasiewicz exponent in non-degenerate deformations of surface singularities
26 Feb. 2021 - special session with Brazil
- 14:00 - 14:45 : Maria Aparecida Soares Ruas (Universidade de Sao Paulo, Sao Carlos)
Mixed Bruce-Roberts number
- 15:00 - 15:45 : Vincent Grandjean (Universidade Federal do Ceara, Fortaleza)
A variation around Malgrange-Rabier condition
- 16:00 - 16:45 : Alexandre Fernandes (Universidade Federal do Ceara, Fortaleza)
Multiplicity of singular points as a bi-Lipschitz invariant
22 Jan. 2021
- 10:00 - 11:00 : Adam Parusiński (Université de Nice)
Equisingular families of surface singularities
- 11:15 - 12:15 : Carles Bivia-Ausina (Universitat Politècnica de València)
Invariants for bi-Lipschitz equivalence of ideals and related topics
11 Dec. 2020
- 10:00 - 11:00 : Wolfgang Ebeling (Leibniz Universität Hannover)
A McKay correspondence for the Poincaré series of some finite subgroups of SL3(C)
- 11:15 - 12:15 : Jean-Philippe Monnier (Université d'Angers)
Some normalizations of real algebraic varieties
27 Nov. 2020
- 11:00 - 12:00 : Beata Gryszka (Uniwersytet Pedagogiczny w Krakowie)
Approximate roots of quasi-ordinary polynomials
- 12:15 - 13:15 : Pedro González Pérez (Unversidad Complutense de Madrid)
The combinatorics of plane curve singularities. How Newton polygons blossom into lotuses
30 Oct. 2020
- 10:00 - 11:00 : David Trotman (Université d'Aix-Marseille)
The smooth Whitney fibering conjecture and density of strongly topologically stable maps
- 11:15 - 12:15 : Grzegorz Oleksik (Uniwersytet Łódzki)
On jumps of the Lê numbers in the family of line singularities
